Published in Anales de la Sociedad Cientifica Argentina, in 1988, in volume 218, pages 15-26

Created: 2016-02-12, modified: 2016-02-12

Published in Anales De La Sociedad Cientifica Argentina, in 1988, in volume 218, pages 37-48

Created: 2016-02-12, modified: 2016-02-12

Published in Anales De La Sociedad Cientifica Argentina, in 1988, in volume 218, pages 63-69

Created: 2016-02-12, modified: 2016-02-12